ArrayListFinder.java

  1. /*
  2.  * *********************************************************************************************************************
  3.  *
  4.  * TheseFoolishThings: Miscellaneous utilities
  5.  * http://tidalwave.it/projects/thesefoolishthings
  6.  *
  7.  * Copyright (C) 2009 - 2023 by Tidalwave s.a.s. (http://tidalwave.it)
  8.  *
  9.  * *********************************************************************************************************************
  10.  *
  11.  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
  12.  * the License. You may obtain a copy of the License at
  13.  *
  14.  *     http://www.apache.org/licenses/LICENSE-2.0
  15.  *
  16.  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  17.  * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the
  18.  * specific language governing permissions and limitations under the License.
  19.  *
  20.  * *********************************************************************************************************************
  21.  *
  22.  * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
  23.  * git clone https://github.com/tidalwave-it/thesefoolishthings-src
  24.  *
  25.  * *********************************************************************************************************************
  26.  */
  27. package it.tidalwave.util.impl.finder;

  28. import javax.annotation.Nonnull;
  29. import java.util.ArrayList;
  30. import java.util.Collection;
  31. import java.util.Collections;
  32. import java.util.List;
  33. import java.util.concurrent.CopyOnWriteArrayList;
  34. import it.tidalwave.util.spi.SimpleFinderSupport;

  35. /***********************************************************************************************************************
  36.  *
  37.  * An implementation of {@link it.tidalwave.util.Finder} which holds an immutable list of items.
  38.  *
  39.  * This class is now implementation only; please use {@link it.tidalwave.util.Finder#ofCloned} instead.
  40.  *
  41.  * @param  <T>   the type of contained items
  42.  *
  43.  * @author  Fabrizio Giudici
  44.  *
  45.  **********************************************************************************************************************/
  46. public class ArrayListFinder<T> extends SimpleFinderSupport<T>
  47.   {
  48.     private static final long serialVersionUID = -3529114277448372453L;

  49.     @Nonnull
  50.     private final Collection<T> items;

  51.     public ArrayListFinder (@Nonnull final Collection<? extends T> items)
  52.       {
  53.         this.items = Collections.unmodifiableCollection(new ArrayList<>(items));
  54.       }

  55.     public ArrayListFinder (@Nonnull final ArrayListFinder<T> other, @Nonnull final Object override)
  56.       {
  57.         super(other, override);
  58.         final var source = getSource(ArrayListFinder.class, other, override);
  59.         this.items = source.items;
  60.       }

  61.     @Override @Nonnull
  62.     protected List<T> computeResults()
  63.       {
  64.         return new CopyOnWriteArrayList<>(items);
  65.       }
  66.   }